Riveter



un. 21. 1925.l 1,524,382

v :.jBowKER RIVETER Filed Aug. 11, 1925 2 sheets-sheet 1 Jan. 27.1925. v 1,524,382

E. BOWKER RIVETER Filed Aug. 11, 1923 2 sheets-sheet 2 Patented Jan. 27, i925.

UNITED STATES PATENT oFF mte?.

IC E

ERVIN BOWKER, OF FALL RIVER,

MASSACHUSETTS, ASSIGNOR DF ONE-HALF TO RIVETER.

Application filed August 11, 1923.

To all 11i/wm. it may concern.'

Be it known that I, ERVIN Bowkun, a citizen of the United States, residing at Fall River, on the county of Bristol and Sta-te of Massachusetts, have invented certain new and useful Improvements in Riveters, of which the following is a specication.

This invention relates to means for riveting studs in bobbin-driving gears. In the manufacture of yarn,

mediate and roving frame bob-bins are all driven by individual cast iron gears, the bobbin resting at its lower end upon a shoulder on the gear and being provided with a groove or slot engaging a stud on rsaid shoulder. The stud is riveted through the shoulder and the'riveting operation is now generally performed by hand. As the riveting or up-setting operation must be per formed in the small space between the shoulder and the teeth ofthe gear, it is practically impossible to rivet the stud satisfactorily with the use of ordinary hammers, and handriveted studs work loose in a very short time so that it is impossible to use bobbins in which the grooves are even slightly worn inasmuch as the bobbins will ride and jump over the stud and make imperfect yarn. The shell of the gear is very thin and if the riveting hammer slips very slightly it will strike the shell and the gear will be broken. Under these conditions, a careful machinist can rivet only a very small number of gears in a given period and he will break from 3l one-siXth to one-'fourth of the total number of gears so that the work is not only slow but is costly inasmuch as the riveting of the studvis the last operation in the making of the gear and when a gear is broken the cost of the same is a complete loss. It is the object of my invention to provide a simple, inexpensive and easily operated device by the use of which an unskilled operator can rivet a large number of studs vwithin a given period without breaking any of the gears while at the' same time the stud will be set more firmly inthe gear than has been possible heretofore. The stated object and otherolojects which will incidently appear ,5,0 in the course of the following description yare attained by the use of such a device as is illustrated in the accompanying drawings, `and the invention resides in certain novel features which will be particularly pointed ,55 out in the appended claims,

the slu'bber, inter.

Serial No. 656,865.

In the drawings:

Figure l is a side elevation, partly broken away, of my riveting machine, a gear being shown therein in section in position to have the stud riveted;

Fig. 2 is a plan view thereof, the gear being omitted; l

Fig. 3 is a longitudinal vert-ical section on the line 3 3 of Fig. 2;

Fig. t is a detail perspective view of the hammer looking at the under side thereof;

Fig. 5 is a sec-tional view of the post and the member of the handle cooperating therewith;

Fig. is a detail anvil;

Fig. 7 is a view of be employed, and

Fig. 8 is a plan view of another form of anvil..

In carrying out my invention, I employ a bed plate l which may conveniently be of the oblong form shown most clearly in Fig. 2, and is provided at its corners with sup'- porting legs or feet 2 and at one end with a central pillar 3, the pillar and thefeet being preferably cast integral with the bed plate. Formed in the bed plate in alinement with the pillar is a longitudinal slot l, and in the sides of the edge thereof are recesses or notches 5. A hammer 6 is provided, and this hammer is preferably a block of steel having one end forked, as shown at 7, to engage around the inner edge of the pillar 3 and lit within the Vrecesses 5, a pivot pin 8 being inserted through the members of the fork and through the pillar to sec-ure the hammer in place. The free end of the.` hammer is preferably slightly arcuate, as shown at 9, so that it may fit around the shell of the gear being operatedupon and in the under side perspective view of the a bushing which may pillar at the inner edge of the hammer adjacent the free arcuate end i of the same I form a series of circular grooves 10, the function of which will presently appear. Adjacent the forked end of the hammena recess 11 is formed in the under side thereof, and this recess receives the upper end of a spring 12 which is disposed between the hammer and the bed plate and is centered by the stud or pin. 13 secured in the hed plate, as clearly shown, The spring holds the hammer against droppin and is itself held in proper position at al times by the recess il and the pin or stud Y but it will, of course,

' adapted.v to lit within the slot el plate adapted to Athe said threaded extremity.

13 in aniobvious manner. lnthe upper side of the hammer is provided a recess or socket 14 in which is engaged the lower end of a striker 15`which is supported in an inclined posit-ion by a guide block 16 secured upon the upper end of the pillar 8. The striker is preferably provided with an enlarged head 1T to receive the blows ofy a fhammer or other tool and it plays in a slot or passage 18 within the guide block, asshownv clearly in Fig. The guide block is preferably formedVv separat-ely from the pillar and reinovably secured thereto by a cap screw 19, be understood that it inay'be'ormed integral with the pillar. Be-

low the hammer, an anvil 2O is secured upon the'bed plate, the. afnvil'y consisting 'o'f a block of steel provided with a groover 21 in itsupper side. This ygroove in use receives the head of the stud to be riveted and as the studs varylsomewhatin size it is found desirable to have the different ends ol' the grooves of different depths, as shown in Figs. 3 and G' It maysometimesvbe desirable t'o-provide a plurality of grooves,'and in Fig. 8 I have shownl an anvilQQhaving 'four grooves 23 in its top, each groove extending lrom one side of the anvil to the center thereof and no two of the grooves being of the same depth.

TheV sides oi'. the anvil may be straight or arcuate, the only essentialbeing that it ein tend close enough to the gearto properly support' the rivet. Fig. (5 shows an anvil having a` curved wall and Fig. 8Y shows a straight wall.

I also einploy'a post 24;, the upper portion oit which is circular in cross section and is lit within the bore 25 of the gear, shown at 26j The post 2d' is constructed with an annular shoulder 2T upon which the Agear rests during the riveting operation and, below the said shoulder, the post isfprovided with a flat-sided portion 28 of the bed and thereby hold the post against rotation relative to the bed plate. Upon reference to Fig.l 2 more particularly, it will'be noted that 'the shoulder 27 not onlysupports the gear upon the postV but also supports the post 'uponlthe bed plate. The lower extremity' oft the post is threaded, as shown at 29, andan adjusting handle is mounted upon This handle c may bebfany' convenient form and preferably consists offahead yor nut portion 30 Y,which is'suitaloly threaded internally toengage thethreaded extremity 29 of vthe post.

lThe said body or nut portion of the handle islconstruc'ted with an internally threaded socket 31 in' which is engaged the inner4 end oit thei leverl member 32 of thehandle, the

said" lever member' projecting out from u'nder'the bed plate so that it maybeeasily i graspedby ythe v'vorl'nnan in the operation Y of the machine.

The post 24 is 'formedwith a. diameter which will permit it to pass within the bore of the smallest gear while the shoulder 27 is oi such a radius thatit will accommodate the largest gear. When the larger gears are to be riveted, a bushing or sleeve 33 may he placed around the post and supported upon the shoulder QT so that the gear which will be litted over the bushing will be supported eoncentrically with the post.

'lli is thought the use ot the device will be readily understood. In assembling the parts, the nut for head member 3() ot the ailjustingylevcr is turned up on the endiof the post until it reaches such a pointy that a quarter turnwill secure or release the post. r'he levei member of the handle is then engaged in the socket 31 andthe device will be ready tor use. lVhen the handle is inthe position shown in Figs. 1 and 2, the post is .ti-'ee to slide in the slot 4.' vThey post isthen pushed forward in the slot,-- the gear. indicated at 26, is placed overthelwstfin inverted position andthe post witlrthe gear thereon is then drawn rearward 'until the shell of the gear abuts t-he free end of the hammer (l, the shoulderd of the gear passingbetween the hammer and thefanvilA and the head ot the stud 35' resting in the groove 21 of the anvil. T he lever handle islthen swung forwardly sothat the nut orheml 30 thereof will bind againstithe under side of the bed"pla-te` and thereby secure the'post against movement,A at the' same time-swing ing the lever out of the wayof theoperator. AV few ligl'it blows from a hammer maythen be delivered uponrthe head 17 of the striker 15 and the force of these blows will be ex; pendeil through the hammer G upon the end of the rivet so as to upset the same, and it has'been 'found that the Vprovision of the grooves 10 very materially expedites the upsetting of theends of the rivet. The lever 32 is then swung rearwardly, releat-iingv the post so that it may befagainpushed forward in the slot 4.' the gear removed and another gea r substituted, the operation being repeated indefinitely until all the 'gears to be riveted have been treated.

From the foregoing descriptiomtaken in connection' with the accompanying draw'- ings, it will be seen that I have provided an exceedingly simple tool whereby the work ofriveting the `studs to -the'gears willbe very expeditiously and efficiently performed, and it has been demonstrated theta large numbeuot studs may be rivetedA in a given period by the'use of my machine by a comparatively unskilled workman without breaking any of the gears.l

Having thus described the invention, what is claimed as new is:

1; An apparatus for th'e'purpose comprising a gear supporting post; arranged adjacent the post to engage under set forth the shoulder of a gear carried by the post to support a stud fitted in said shoulder, a hammer mounted above the anvil to bear upon the end of the stud resting on the anvil, and a striker bearing upon the hammer,

An apparatus for the purpose set forth comprising a post to support a gear, an anvil arranged adjacent the post and provided in its upper side with a groove to receive a stud engaged in the shoulder of a gear carried by said post, a hammer disposed above the anvil and arranged to rest upon the end of the stud, a striker bearing upon the upper side of the hammer, and yielda-ble means for holding the hammer in a raised position.

3. An apparatus for the purpose set forth comprising an anvil having a stud-receiving groove in its upper side, a hammer pivotally supported above the anvil and adapted at its free end to bear upon a stud resting on the anvil, a striker bearing upon the upper side of the hammer, yieldable means for holding the hammer raised, and means for supporting a gear adjacent the anvil and the hammer with a shoulder on the gear fitting between the hammer and the anvil, and a stud engaged in said shoulder supported by the' anvil.

a. An apparatus for the purpose set forth comprising an anvil, a hammer mounted above the anvil, a striker bearing upon the upper side of the hammer, a post adapted to support a gea-r adjacent the hammer and the anvil with a shoulder on the gear projecting between the anvil and the hammer and a rivet engaged in said shoulder resting upon the anvil, and means for shifting said post to and from the hammer and the anvil.

5. An apparatus for the purpose set forth comprising a bed plate having a longitudinal slot therein, a gear-supporting post movably mounted in said slot and having a fiat-sided portion withiir the slot whereby rotation of the post will be prevented, a handle having a body portion in threaded engagement with the lower end of the post whereby to shift the same along the slot and secure it in a set position between the ends of the slot, an anvil secured upon the bed mer, a guide block carried by the upper end of the pillar, a striker supported oblique-ly in said guide block and bearing upon the upper side of the hammer, a post supported upon the bed plate and having a portion passing through the slot in the bed plate, and a handle member having threaded engagement with the lower end of the post below the bed plate whereby to shift the post along the slot and to bind the post against the bed plate.

7. Apparatus for riveting a stud in a shoulder on a gear comprising means for supporting the gear, means to support the stud in the shoulder of the gear, a hammer resting on the stud above the shoulder of the gear, and means for applying upsetting force to the hammer.

In testimony whereof I aiiix my signature.

ERVIN BOVVKER. [n s.] 

